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Computer Organization & Architecture

Foundations of Computing7

Instruction Set Architecture5

Datapath & Control Unit4

The ALU: the calculator hiding inside every CPU
The datapath: wiring the register file, ALU and memory together
The control unit: the conductor that sets every switch
How does a CPU actually multiply and divide?

Instruction Pipelining4

Memory Hierarchy7

I/O Interfaces & Interrupts5

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Computer Organization & Architecture

Foundations of Computing7

Instruction Set Architecture5

Datapath & Control Unit4

The ALU: the calculator hiding inside every CPU
The datapath: wiring the register file, ALU and memory together
The control unit: the conductor that sets every switch
How does a CPU actually multiply and divide?

Instruction Pipelining4

Memory Hierarchy7

I/O Interfaces & Interrupts5

Boot to Execution: The Full System Trace5

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The control unit: the conductor that sets every switch

Every multiplexer and every ALU operation needs to be set correctly, every single cycle. The control unit is the circuit that does exactly that, decoded straight from the opcode.

11 min readUpdated 2026-09-03computer-architecturecontrol-unitmicroprogramming